Valve



Dec. 13, 1949 J. w. GARRISAON 2,491,104

VALVE Filed Jar 1'7, 1946 Inventor WWW 6m Patented Dec. 13, 1949 VALVE stmf tvi cai-nson, oeeaiisiae: earn. Application January 17, 19 i6; seiiaiivoj 641*,689

f'vlde an"'ffi'cient, simply con striicted valve for Iiiisltallatibrtin"suchmainsandiiiieratierf tozclose the line by increasedgbr' aecei eratea, flow-oifiuid in the line resulting from abreak in --the* line,

and whereby service may be maintaineclbetween the valve arid the source of supply' bvhile' thbreak is being repaired.

Other and subordinate objects, also comprehendedby my invention: together withth'ifrcise nature of "my'imprevements; and th'manifold advantages thereof will be readily understood when the succeeding description and claims are read with reference to the drawing accompanying and forming part of this specification.

In the drawing:

Figure 1 is a view in longitudinal section of my improved valve, in a preferred embodiment thereof and with the parts shown in the position which they assume when the valve is open.

Figure 2 is a view in side elevation partly broken away and shown in section,

Figure 3 is a view similar to Figure 1 but showing the parts in the position assumed by the same when the valve is closed, and

Figure 4 is a detail view in horizontal section taken on the line 4-4 of Figure 2.

Referring to the drawing by numerals, according to my invention, in the illustrated, preferred, embodiment thereof, an elongated rectangular valve casing I having an inlet end 2 and a discharge end 3 is interposed in a main. or trunk, pipe line 4 with its inlet end 2 coupled in said line, as at 5. A short pipe section I is coupled to the discharge end 3 of said casing l, as at 8, for coupling, in turn, into the line 2 at said discharge end 3. The valve casing l forms a valve seat 9 therein at the discharge end 3 for a, gate valve member Ill swingable into engagement with said seat and pivotally mounted in the bottom of the casing as by means of side studs H on the member journaled in lugs l2 on the casing l. The described pivotal mounting is below the pipe section 7 so that the valve member 8 may open downwardly and away from said seat into a horizontal position below the section I. As will be understood, the valve member It] opens in a direction opposite to the direction of flow through the main line 4 and indicated by the arrow in Figure l. A stop lug l3 on the bottom of the casing I spaces the valve member [0, when open.

valve member ID as follows.

from said bottom arid'maint'ams the in nori'zorit'al' position.

A'euppd valve'operatingmember' 14 is pivoted section Ttohangfp'eiidenf from itsfpivot' for a suitable distance an be 's'wung' in" the diretion of the fl'ow ui'rou'g'rf 'ths-main pi d'lme 4.

A' enamfie 'is suitably eoiineetd'at one end to the bottom edge of said member I4 -arid at its opposite fid toaneyef bolt, or 'stud, ITSuitabIy fixed td'the vaivememper' l 0' and eirtendin late'rally fromthe' working 'face of saidmembe As will be seenfthe chainldisdrrhiigd so th'at, when the valve operating member 16 hangs vertical, and said valve member I0 is open, said chain will exert a pull on the valve member Ill well above the pivot l2. The valve operatin member 14, as will be manifest, is arranged to be swung forwardly sufliciently to close the valve member ID on the valve seat 9 by pull on the chain l6.

Counterbalance means are provided for the One stud II is extended out of one side of the valve casing l and lhas swingably mounted thereon a weight carrying arm l8 extending forwardly of the valve member ID when said member is open. Countearweights I9 are removably mounted on said arm I8 between the nuts 20.

To prevent the weight carrying arm [8 from being bent, or broken, when the valve member ID is suddenly closed, a ratchet wheel 2i is fixed on the extending stud H, and a spring pressed pawl 22 is provided on said arm and adapted to engage the ratchet wheel 2| when said arm I8 is swung as the result of closing of the valve member.

A pressure vent cock 23 is provided on top of the valve casing I for a purpose presently explained.

Describing now, the operation and use of my invention. For reasons well understood in the art, when a break occurs in a water main line, or the like, the rate of flow through said line increases, or is accelerated. With my described valve installed in such a line, the valve member is counterbalanced by means of the counterweights l9 so that said valve member overbalances the weight carrying arm I8, the counterweights l9, and the drag of the chain l6, and will remain open. under a given rate of flow through the main pipe line 4 and valve casing I. Should a break occur in said line, in advance of the valve, the consequently accelerated flow of fluid through the casing l acting against the valve operating memher M will cause said member to swing forwardly and thereby close the valve member I0 through pull on the chain Hi. In this connection, it is to be noted that the space beneath the valve member II) when said member is open, as shown in Figures 1 and 2, provides for the fluid in the valve casing I flowing beneath the valve member I0 and lifting the same into its closed position, as shown in Figure 3. When the valve member I 0 is closed, the main pipe line 4 will be closed between the valve and the source of supply, or in other words behind the break in the line, so that service between the valve and the source of supply may be maintained while the break in the line is being repaired. Obviously,

when the valve member i0 is closed, pressure will be built up in the valve casing I which must be relieved before the valve member I0 may open.

By opening the vent cock 23, the built up pressure in said casing I may be relieved so that said valve member ID may reopen, or be reopened,when the given pressure in the main line 4 is reestablished. When the valve member Ill is open, the weight carrying arm [8 may be swung on the extended stud H into the proper position for counterbalancing of said valve member.

The foregoing will, it is believed, sufiice to impart a clear understanding of my invention without further explanation.

Manifestly, the invention, as described, is susceptible of modification without departing from the inventive concept and right is herein reserved to such modifications as fall within the scope of the appended claim.

and be swung by fluid flowing through the section, a flexible connection between said operating and valve members, and means to counterbalance said valve member when open comprising a settable weight carrying arm on the pivot of said valve member, and ratchet and pawl devices for holding said arm in set position.

JOHN W. GARRISON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 524,393 Nuly Aug. 14, 1894 549,224 Atkinson Nov. 5, 1895 598,935 Jewell Feb. 15, 1898 810,746 Hadley Jan. 23, 1906 972,338 Collin Oct. 11, 1910 1,394,332 Myer "Oct. 18, 1921 1,924,733 Brock Aug. 29, 1933 FOREIGN PATENTS Number Country Date 485,303 France Apr. 2, 1917 

